body {
    min-width: 320px;
    max-width: 750px;
    margin: 0 auto;
    background-color: #f2f4f7;
}
a {
    text-decoration: none;
    color: #707070;
}
// 约束当屏幕大于750px时，html字体大小就不变化了
@media screen and (min-width: 750px) {
    html {
        font-size: 37.5px !important;
    }
}
.wrap {
    background-color: #fff;
    padding-bottom: 1.146667rem;
}
.header {
    height: 2.1333333rem;
    border-bottom: 1px solid #eaeaea;
    text-align: center;
    line-height: 2.133333rem;
    font-size: 0.933333rem;
    color: #1c1c1c;
}
.nav {
    display: flex;
    // 显示不开就强制换行
    flex-wrap: wrap;
    padding: 1.2rem 0 1.6rem 0;
    .item {
        // 第一步
        display: flex;
         width: 33.33%;
        // 第二步 纵向显示
        flex-direction: column;
        // 第三步 水平居中
        align-items: center;
       
        img {
            width: 3.36rem;
            height: 3.36rem;
        }
        span {
            font-size: .666667rem;          
        }
        // -n+3选择前3个
        &:nth-child(-n+3) {
            margin-bottom: 1.653333rem;
        }
    }

}
.go {
    margin: 0 .266667rem 1.146667rem .48rem;
    img {
        width: 100%;
        height: 100%;
    }
    
}
.content {
    padding: 1.066667rem .64rem;
    background-color: #fff;
    margin-top: .266667rem;
}
.con_hd {
    height: 1.013333rem;
    display: flex;
    // 分开两侧对齐
    justify-content: space-between;
    line-height: 1.013333rem;
    h4 {
        // h4自己有margin值
        font-size: .746667rem;
        color: #333;
        margin: 0;
        img {
            width: 1.013333rem;
            height: 1.013333rem;
            // 图片与文字对齐 让后面的文字垂直居中
            vertical-align: middle;
        }
    }
    a {
        font-size: .586667rem;
        color: #999;
    }
}
.con_bd {
    position: relative;
    .swiper-container {
        // width: 100%;
        height: 100%;
        // 网页要求宽为540px
        width: 14.4rem;
        padding-top: 50px;
        padding-bottom: 50px;
      }
  
      .swiper-slide {
        background-position: center;
        background-size: cover;
        width: 300px;
        height: 300px;
        a {
            width: 9.013333rem;
            height: 10.026667rem;
            img {
                width: 100%;
                height: 100%;
            }
        }
        p {
            width: 9.013333rem;
            font-size: .666667rem;
            margin-top: .533333rem;
            text-align: center;
            color: #333;
        }
      }
}
.study_con {
    padding-bottom: 4.266667rem;
}
.study {
    margin-top: .266667rem;
    
    .study_fo {
        padding: .266667rem;
    }
    .swiper-slide {
       
        font-size: 18px;
        background: #fff;
        background-color: #fff;
        width: 7.733333rem;
        height: 9.066667rem;
        border-radius: 0.266667rem;
        // 阴影
        box-shadow: 0 0px 10px rgba(0,0,0,.3);
        img {
            width: 100%;
        }
        h5 {
            font-size: .693333rem;
            margin: .533333rem 0;
            font-weight: 400;
            padding: 0 .266667rem;
        }
       p {
           font-size: .693333rem;
           color: #f40;
           padding: 0 .266667rem;
       }
      }
}
.footer {
    position: fixed;
    left: 0;
    bottom: 0;
    background-color: #fff;  
    height: 2.933333rem;
    width: 100%;
    z-index: 999;
    margin-top: 4rem;
    display: flex;
    padding: .533333rem;
    border-top: 1px solid #ccc;
    .item {
        flex: 1;
        display: flex;
        flex-direction: column;
        align-items: center;
        img {
            width: 1.04rem;
            height: 1.093333rem;
        }
        p {
            font-size: .586667rem;
            color: #666;
            margin-top: .266667rem;
        }
    }
}